21. A boat has a maximum speed of 5.0 m/s in still water. The boat heads East across a 300 m river that flows South at 2.5 m/s.
a. Find the time it takes to cross the river
b. Find the distance the boat travels downstream
c. Find the resultant velocity

Two carts, one of mass 2m and one of mass m, approach each other with the same speed, v. when the carts collide, they hook together. assume that positive momentum is to the right. which graph best represents the momentum of both carts over time, before and after the collision?

Two balls, each with a mass of 0.5 kg, collide on a pool table. is the law of conservation of momentum satisfied in the collision? explain why or why not

The flow of electrons from one atom to another is called